Sometimes I attend several study groups.
Most of them are relevant to English as following.
- English free talk (5 USD, 1.5 hr)
- English lesson with Japanese teacher (10 USD, 3 hr)
- Economic magazine discussion (Free, 1.5 hr)
- Book sharing and discussion (Free, 1.5 hr)
- English conversation study (Free, 1.5 hr)
Although I also experienced organizing some study groups, I am almost only attending now.